Gas burner



April 3, 1928.

R. ElcKwoRTl-l' GAS BURNER Filed Aug. 5. 1927 176:31 ier' fhl/@NZPatented Apr. 3, 1928.

REGNIER EICKWORTH, F DORTMUND, GERMANY.

GAS BURNER.

Application filed August', 1927, Serial No. 210,796, and in GermanyAulgust 6, 1926.

Gas burners are known with which the gas under pressure drives aventilator wheel which draws 1n the combustion air and,

orces it into the combustion chamber. The invention relates to a newburner of this kind which, contrary to the known burners,

is also adapted for burning high-grade gases, for instance, coke ovengases.

According to thev invention, the gas after l0 being partially deprivedof its pressure is conducted through a passage to a mixing chamber inorder to 'deliver the air, the delivered air flowing into said4 mixingchamber through an independent passage. The l5 gas and air quently mixedin a suitable manner quite 1ndependently of the delivery device, andconducted to the combustion chamber. This makes it possible to eect thedelivery of air by means of the energy contained in the gas, even whenhigh-grade gases are burnt, and consequently to secure an automaticregulation of the burner without danger of the -lame being forced backagainst the wheel 26 and destroying the device.

The front portion of the air passage, or of the gas passage, chamber. Inorder to obtain a certain degree of mixing, exchange apertures may be 80arranged in the divisoin wall between the two passages through which gasreaches the air passage, or air reaches the gas passage. 'Ihe portionsof the burner facing the combustion chamber may be provided with adevice for water cooling. Especially a conical hollow body connected tothe water main may preferably be arranged in front of the center portionof the wheelv for protecting the wheel against the reacting heat, andde- 4o iecting the air stream to the side of the gas stream.

In the drawings,'various constructions of the burner are shown,

In the drawingsv Fig. 1 is a longitudinal section,

Fig. 2 is a cross section through one por tion of the burner,

Fig. 3 is a longitudinal section of another construction,

Fig. 4 is a longitudinal section through a burner with water cooling,and

Fi 5 is a cross section of the above.

With the burner according to Figs. 1 and 2, a wheel 3, provided with gasinlets 2, and

carrying the ventilator blades 4 and the turbine streams are, therefore,Subsc-into the air passage.

may be used as a mixing.

blades 5, is disposed in front of the annular gas chamber. The gas underpressure flows through the nozzles 10- to the blades 5, impartingrotation to the wheel, the result being that air is drawn through theventilator wheel 4 through the chamber 12 in the known manner. Accordingto the invention, gas and air are independently conducted at the rear ofthe wheel into a mixing chamber. The air flows through the duct 6 andthe gas through the annular passage 7. In order to obtain a ofpre-mixing, the duct 6 ma be provided with exchange apertures 8 t roughwhich ain may enter intothe gas passage, or gas The adjustable cover 9serves for regulating the entry of air.

The chamber 12 is inthe form of a central opening in the casing 1, whichhas an annular chamber surrounding the opening 12. From this annularchamber, to which the gas inlet 2 leads, in the wall of the casing,direct the gas against the outer vanes 5 to turn the Wheel 3, and thuscause the blades or van'es to draw 1n air through the inlet opening 12.

The casing is extended forward enveloping tubular member 6, andproviding the passage 7, this passage contracting because the forwardextended part of the casing 1 converges with respect to the member 6.

With the construction of the 'burner according to Fig. 3, the inner duct6 is made shorter than the outer duct 11 so that the end of the outerduct serves. as a mixing chamber.

With the construction according to Figs. 4 and 5, a conical hollow body13 is dis osed at the mouth of the linner duct 6 whic deflects the airin the direction of the gas passage, radiating heat. Similarly anannular hollow body 14 is disposed in front of the outer duct. The twoinner spaces 15 and 16 of these bodies communicate through the duct 17.The cooling water irst enters the hollow body through the connection 18whencel it flows through the duct 17 into the outer annular body 14 andthen away through the connection 19.

I claim:

1. A burner comprising a casing having a central air inlet and anannular gas chamber therein surrounding said central air inlet, saidchamber having nozzles through which gas may issue, a wheel having anouter series of vanes adjacent said nozzles and an the nozzles 10,provided certain degree ..95 thus protecting the wheel agalnst the-Iinner series of vanes ad'acent said inlet whereby gas acting u on t eouter series `of vanes may turn sai wheel to draw air through the inlet,and a tubular member in line with said inlet within the casing, thecasing being extended to envelop said member, providing an annularpassage between said member and the extended portion of the casingthrough which the gas is impelled, the air and gas mixing after the airenters the said member.

2, A burner eomprisino' a casing having a central inlet opening andnular chamber to which gas is admitted, a wheel having a series ofblades in line with contalning an an# said opening, and a second seriesof blades surrounding the first series, the casing havin nozzles throughwhich gas issuing from said chamber may be directed against said secondseries of b des, a tubular member in line with said inlet in which airis impelled by the first series of blades, the casing being extended toenvelop said member, a hollow body adjacent the end' of said member, andmeans :for admitting a coolinfr iuid to said body and conducting itthere rom.

In testimony whereof I hereunto aix my signature.

REGNIER EICKWORTH.

